Work-holding apparatus



A. c. ASPER -wonknomina;4 mARA'rus Jan. 15, 1929. 1,698,982

Filed .April le. 192? l 2 Sheets-sheet 1 Mikes-I.'

INVENTOR.

Jan. l5, 1929. 1,698,982

l A. C. ASPER WORK HOLDING APPARATUS Filed April 18. 1927 2 Sheets-Sheet 2 6 ||I TM Il! I INVENTOR. mf 62W Bl/a/um )(7721 ATTORNEY Patented Jan. 15, 1929.

UNITED STATES ALBERT C. ASPER, OF KANSAS CITY, KANSAS.

WORK-HOLDING APPARATUS.

Application led April 18, 1927. Serial No. 184,649.

Bly invention relates to improvements in work holding apparatus. t is particularly well adapted for properly positioning and securely holding objects, such as bearing 5 caps, for surfacing with an abrading device, such as a iile, or for resurfacing the same to compensate for wear occasioned by use.

One of the objects of my invention is to provide an apparatus of the kind described,

10 which is simple, cheap, durable, not liable to get out of order, which is easy to adjust and operate, and which will ensure that the new surface produced in the abrading operation will be parallel to the original surface,there by providing a proper fitting between the cap and the shaft with which it co-operates.

A further object of my invention is to provide novel means for effecting proper positioning of the work, and novel means for limiting the action thereon of the abrading device.

Still another obj ect of my invention is the provision of novel means for tightly clamping and holding the work in the position to which it may be adjusted preliminary to the abrading operation.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawings, which illustrate the preferred embodiment of my invention,

Fig. 1 is a vertical central sectional View on the line 1 1 of Fig. 2, of my improved apparatus.

Fig. 2 is a plan view of the same, shown mounted on a suitable support.

Fig. 3 is a side elevation of the same.

Fig. 4 is a section, partly broken away, on

the plane of the line 4 4 of 3, the stop gage and file beine` removed, and the positioning gage substituted therefor.

Fig. 5 is a side elevation of lthe oscillatory work supporting member.

Fig. 6 is a reduced plan view of the base and a portion of its support.

Fig. 7 is an under plan view of the positioning gage.

Fig. 8 is a top view of the member show in Fig. 5.

Fig. 9 is a top view of the cam lever.

Fig. 10 is a top view of the stop gage.

11 is a cross section ofthe same on the line 11-11 of Fig. 10;

Similar reference characters designate similar parts in the different views.

The apparatus is provided with a base comprising a member 1, which is ada ted to be supported upon and fastened by olts 2 to a bench or other suitable sup ort 3.

The member 1 is provided wit i radial upstanding arms 4, the upper ends of which terminate in a horizontal externally threaded ring on which is fitted an internally threaded, revoluble and vertically movable ringhbearing 6, the upper side of which is provided with a horizontal plane annular surface 7, which is adapted to support a stop gage 8, which may be of any suitable form, and which in the drawings is shown as rectangular and provided with a central square opening 9, and four depending corner legs 10, which are adapted to rest upon the annular surface 7, and which engage the inner periphery of the bearing 6, as shown in Figs. 1, 2 and 3.

The stop gage 8 has fastened to its upper sidekat opposite sides respectively of the opening 9, two parallel horizontal flathardened steel plates 11, the upper sides of which form stop surfaces, which, when the gage 8 is mounted on the bearing 6. are both in the same plane and parallel with the annular surface 7.

The top plates 11 are adapted to engage and limit the downward movement of an abrading device', such as a file 12, which is being used for resurfacing the flat inner side portions of a bearing cap 13, which it may be desired to resurface to enable it to properly co-operate with the shaft, not shown, with which it is to be used.

For supporting and holding properly positioned the cap 13, during the filing operation,I provide the following described work supporting means comprising a work supporting member having a cylindrical head 14, provided with a flat upper side havingv in it a central rectangular slot 15, Fig. 8, the ends of which respectively communicate with two diametrically opposite vertical slots 16, provided respectively in opposite sides of the head 14.

The work supporting member is provided with a central vertical tube 17, the upper externally threaded end of which is itted in a central threaded vertical hole in the closed lower end of the head 14. I

In order that the work supporting member may be adapted for universal adjustment, the lower portion of the head 14 has a spherically formed peripheral portion 18 which is mounted and adapted for universal movenient in a correspondingly shaped scat 19, provided in the upper side of the base ineinber 1 concentric wit-h the axial center there oi.

For fastening the worksupporting ineinber 14 in the position to which it maybe adjusted, it is provided with anabutrnent, which may comprise a nut 20, which is fitted on the threaded lower end of the tibe 17, and which is adapted to bear against the lower end of a central vertical tube 21, the upper end of which is threaded and ltitted in a central threaded hole provided in the base member y1.

The upper side of the nut is spheri-i,

cally concave, the arc of which has the same center as the spherically convex portion 18 oi the head 14. The lower abutting end ot the tube 21 is spherically convex, as is the lower end of a sleeve 22 which is adapted to bear against the nut 20, and which is vertically slidable and non-rotatable on the tube 21.

For holding the sleeve 22 from rotation, it inay have fastened to it one end of a brace bar 23. the other end ot which may -be fastened to the bench 3. Fig. 4.

F or Vforcing the sleeve 22 downwardly against the nut 20, so as to retain the work holding member in its adjusted position, I provide al cam lever 24, Figs. 3, 4, and 9, which is provided at one end with a tubular portion 25, which is revolubly fitted on the tube 21, and the lower fiat end ot which is adapted to bear against the upper end of the sleeve 22. The upper end of the tubular portion 25 is provided with two semicircular cani surfaces 26, which are adapted to respectively engage corresponding cam surfaces 27 on the lower side of the base member 1.

By turning the cain lever 24 counter clockwise, as viewed troni above, the sleeve 22 will be forced downwardly into tight engagement with the nut 20, thereby holding the latter and with it the work supporting member from movement. Y

For supporting the work, such as 'the cap 13, upon the head 14, there inay be mounted upon the top of the head 14, at opposite sides respectively ot the slot 15, two parallel channel bars 28, Figs. 1 and 2, upon which the bottom side ol: the cap 13 rests.

F or tightly clamping the work 13 upon the parallel bars 28, I provide a horizontal clamping bar 29, which adapted to be disposed in the semi-cylindrical port-ion et the upper side of the cap 13 and which has mounted on it at opposite ends respectively of said cap two links 30, Figs. 1 and 4, which support a cross bar 31, which is centrallyT pivoted by a horizontal pin 32'to the upper end of a vertical rod 33,' which extends through the tube 17 and which, outside the tube, has a threaded portion on which is tted a hand wheel 34, the upper Yside oi: which bears against the lower end of the -The links 30 are disposed respectively at opposite sides ot the rod 33. The bar 31 is sli'dable in' the slots 16. For normally forcing the rod 33, and with it the bar 31, upwardly, a coil spring encircles the rod 33 and has its lower end bearing against an annular shoulder 36 on the inner side ot the tube 17. The upper end ot the spring bears against a circular inverted cup shaped shield 37 on the rod 33 in the head 14, the upper side ot said shield bearing against a head with which the upper end of the rod 33 is provided. When the cap 13 has been tiled and removed, the spring 35 will keep the wheel 34 against the tube 17.

The head 14 is provided with peripheral openings 33 through which may pass iilings which enter the head 14 through the slot 15 and which are deflected by the shield 37 through the openings 3S, thus preventing the i'ilings getting into the seat 19.

For preventing the filings from entering the threaded connection between the base ring 5 and the bearing 6, I provide a tunnel shaped deiector 39, the smaller lower end of which projects into the ring 5, and the larger upper endet which has an annular peripheral flange 41, which extends into an inner annular groove 42 in the bearing G.

F or properly positioning the work with respect to the stop gage 8, there inay be provided a positioning gage 43, Figs. 4 and 7, which is provided with four radial legs 44, which are adapted to rest upon the annular surface 7, when the stop gage 8 is removed, and which are adapted to engage the inner periphery oIn the bearing 6, in the same inanner as do the legs 10 of the stop gage The legs 44 are ot suoli length and height that the plane bottom side, of the gage 43, will be the saine distance iti-0in the plane ot the annular surface 7 as is the distance from said annular sui-tace 7 to the plane of the upper sides of the stop plates 11, when the gage 8 is mounted in operative position on the bearing 6, as hereinbetore described.

The peripheral lower portion of the bcaring` 6 is provided with graduations '45. which may represent respectively thousandths ot" an inch in vertical movement o't the bearing 6 and witl` which cti-operates an upstanding pointer 4", the lower end ot which is fastened to the base 1, Figs. 3, 4

and 6.

In the operation of the invention, the work 13 is fastened on to the channels 23. in the manner lieieinbetore described, the nut 2O being tightened against the tube 21 just sutiiciently to hold the head 14 with a light pressure in the seat 19.

rIhe positioning gage 43 then has its fiat Sil IUI)

'released position, after which 'the bearine;

bottom side placed upon the work 13 with the legs le separated from the annular' surface 7. The cani lever 2-lis disposed in the 6, is turned on the ring so as to move ui wai'dly, and the rod 33 tipped lateral at different sides, until the portions off 'the legs 44, which are to engage thc bearing siii'- face T are just 'barely clear of said suriace. vThe adjustment is made until light can barely be seen between each leg U and the adjacent portion of the annular surface T.

The lever 2-'1 is then swung to the tightening ,position thereby forcing 'the sleeve'22 tightly against the nut 20, thereby fastening the work supporting means and the work 13 in their proper adjusted position.

The positioning gage 43 is then removed, and the stop gage S substituted therefor on the annular surface 7. At this time the upper side of the work 18 will be substantially in the plane of the upper sides of the stop plates l1.

The bearing G is then turned so to be lowered the desired distance, that it is designed to file away the upper side of the work 13. This amount may be determined by observation of the pointer 4G and the graduations 41:5.

The file 12, or other abrading device, may then be used to dress away the upper side of the work 13. The abrading operation is continued until the le 12 rests upon both plates 11, when the file is disposed at any point over the work. They new surfaces, thus produced on the work will be exact-ly parallel with the original surface, so that the cap will properly lit the shaft with which it has been used when it is applied to the shaft.

I do not limit my invention to the structure shown and described, as many modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention.

That l claim is l. In an apparatus of the kind described, a bearing having a plane upper surface, a gage revoluble thereon having an upper plane stop surface parallel with said surface and adapted to engage and limit the downward movement of an abradingY device operating on ,the work, and means adapted for universal adjustment of and for supporting the work iii/a position projecting above said stop surface.

2. In an apparatus of the kind described, a bearing having a` plane upper surface, a gage revoluble thereon having an upper plane stop surface parallel with .said surface and adapted to engage and limit the downward movement of an abrading device operating on the work, and means adapted for universal adjustment of and 'for supporting the work in a position projecting above said y'stop surface, said bearing and said work supporting means being vertically adjustable. with respect 'to each other.

ln an apparatus of the kind described,

a support, a bearing revoluble thereon and having threaded engagement therewith and oridcd with Aa plane upper surface, a gage rcvolulile ou said surface and having an upper plane 'stop Asurface parallel with said. surface and adapted to engage and limit the downward 'movement of an abradiiig device operating on the work, and means adapted for vuniversal adjustment of and for suppoitl ing the work in a position j irojecting above said stop surface.

4L. ln an apparatus vof the kind described, a support, a bearing vertically adjustable thereon having a. plane upper surface, a gage revoluble on said surface and having an upper plane stop surface parallel with said surface and adapted to engage and limit the downward movement of an abrading device operating on the work, and means adapted for universal adjustment. of and for supporting the work in a position projecting above said stop surface.

5. In an apparat-us of the kind described, a bearing having a plane upper surface, a support on which the bearing is revoluble and has threaded engagement therewith` a gage revoluble on said surface and having on its upper side two stop surfaces at opposite sides respectively of axis of said gage and disposed parallel with the first named surface and adapted to engage and limit the downward movement of an abrading device operating on the work, and means adapted for universal adjustment of and foi supporting the work between and projecting` above said stop surfaces.

G. ln an apparatus of the kind described, a support, work supporting means adapted for universal adjustment thereon and provided with an abutment, a sleeve on said support and adapted to bear against said abutment, brac-ing means connecting said sleeve with said support for holding the,

sleeve from turning, and tightening means between said support and said sleeve for forcing the latter against said abutment.

7. ln an apparatus of the kind described, a support, work supporting means adapted for universal adjustment thereon and provided with an abutment, a sleeve slidable and non-rotatable on said support and adapted to bear against said abutment, and tightening means for forcing said sleeve against said abutment.

S. In an apparatus of vthe kind described, a support. having a cam surface and a seat, work supporting means adapted for universal adjustment on said seat and having an abutment, a sleeve on said support adapted to bear against Said abutment, and a tightening member revoluble on said support and bearing against said Cain Surface and said sleeve for forcing-the latter against said abut-nient. v

9. In an aoparatus of the kind described, a support having a Cani surface and a seat, Work supporting means adapted for universal adjustment on Said seat and having' an abutment, a Sleeve non-rotatably mounted on said support and longitudinally movable thereon against said abutment for forein;` said Work support-nuimeans against said seat, and a tightening' member revoluble on said support between said cani surface and said sleeve and adapted when revolved in one direction to engage said Cam surface and said sleeve ttor forcing the latter againet said abutment.

l0. In an apparatus Ot the kind described, a ring bearing' having an annular upper plane surface, a gage having an opening therethrough and revoluble on said annular `Surface and having an upper plane stop surface parallel with said annular surface and adapted to engage and limit the downward ine-'vement oit an abrading` device operating on the Work, and means adapted for universal adjustment off and vfor supporting' the Work in said opening and projecting above said stop surface.

ln testimony whereof I have signed niv name to this specification.

ALBERT C. ASPER. 

